GB1427808A - Super-wide-angle photographic lens assembly - Google Patents
Super-wide-angle photographic lens assemblyInfo
- Publication number
- GB1427808A GB1427808A GB2216973A GB2216973A GB1427808A GB 1427808 A GB1427808 A GB 1427808A GB 2216973 A GB2216973 A GB 2216973A GB 2216973 A GB2216973 A GB 2216973A GB 1427808 A GB1427808 A GB 1427808A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- lens assembly
- focal length
- wide
- super
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/04—Reversed telephoto objectives
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
1427808 Wide angle lenses ASAHI KOGAKU KOGYO K K 9 May 1973 [11 May 1972] 22169/73 Heading G2J A wide angle lens assembly of focal length F having aperture ratio of about 1:3À5, an effective photographing angle wider than 100 degrees, and a back focus greater than 1À85 F is as shown in Fig. 1 comprising eleven lenses arranged in 10 groups. The lens assembly satisfies the following conditions: (1)F/2À3<|F 1.2.3.4 |<F/1À4;F 1.2.3.4 <o (2)F/1À2<F 1.2.3.4.5.6 <F/0À6 (3)0À5F<|r 14 |<0À8F;r 14 <o (4)0À25<n 8 -n 7 <0À35 (5)0À9F<r 19 <1À5F (6)0À8F<F 7 <1À2F;1À2<F 7 /|F 8 |<2À0;F 8 <o where: F 1.2 .... i is the combined focal length of the subassembly consisting of the lenses from the first lens to the i<SP>th</SP> lens, Fi is the focal length of the i<SP>th</SP> lens, ni is the refractive index of the i<SP>th</SP> lens of the d-line, and di and ni are as shown in Fig. 1. Optical data are given for two examples, the second corresponding to Fig. 3 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP47046604A JPS5123348B2 (en) | 1972-05-11 | 1972-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1427808A true GB1427808A (en) | 1976-03-10 |
Family
ID=12751891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2216973A Expired GB1427808A (en) | 1972-05-11 | 1973-05-09 | Super-wide-angle photographic lens assembly |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3841736A (en) |
| JP (1) | JPS5123348B2 (en) |
| GB (1) | GB1427808A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5416409B2 (en) * | 1974-02-01 | 1979-06-22 | ||
| DE2514081C2 (en) * | 1975-03-29 | 1982-09-09 | Fa. Carl Zeiss, 7920 Heidenheim | Very bright wide-angle lens with a long focal length on the image side |
| US4777563A (en) * | 1986-05-02 | 1988-10-11 | Toshiba Battery Co., Ltd. | Thin type electronic instrument |
| CN100406951C (en) * | 2006-09-11 | 2008-07-30 | 中国科学院上海技术物理研究所 | Ultraviolet object lens in aperture wide wave range for ultraviolet detection |
| KR100843452B1 (en) * | 2006-12-29 | 2008-07-03 | 삼성전기주식회사 | Optical movement sensing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS528918B2 (en) * | 1972-08-11 | 1977-03-12 |
-
1972
- 1972-05-11 JP JP47046604A patent/JPS5123348B2/ja not_active Expired
-
1973
- 1973-05-02 US US00356687A patent/US3841736A/en not_active Expired - Lifetime
- 1973-05-09 GB GB2216973A patent/GB1427808A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5123348B2 (en) | 1976-07-16 |
| JPS4912823A (en) | 1974-02-04 |
| US3841736A (en) | 1974-10-15 |
| DE2323672B2 (en) | 1975-10-23 |
| DE2323672A1 (en) | 1973-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |